feat: kernel roadmap wave — bits4, policy v4, Pear/Bare compatibility

- protocol/booter: bits4 handshake, proc surfaces, boot policy v4, telemetry v4
- coreutils: nohup + ensure-man-pages; seed-man-pages fixes for extra pages
- kernel-runner: no static node:module (Pear); bare-module createRequire
- docs: handbook, reference, ADR, compatibility matrix, verify scripts

docs/reference/README.md

@@ -14,6 +14,7 @@ This directory holds the split **file-by-file inventory** that used to live in t
 | §14, §14a | [Environment variables and POSIX appendix](environment-and-posix-appendix.md) |
 | *(kernel feature bits & handshake)* | [Kernel extensions](kernel-extensions.md) |
 | *(bits → env → proc → ctx)* | [Kernel capabilities index](kernel-capabilities-index.md) |
+| *(version alignment)* | [Compatibility matrix](compatibility-matrix.md) |
 | *(roadmap)* | [Feature roadmap status](feature-roadmap.md) |
 | §§15–16 | [Out of scope and tooling](out-of-scope-and-tooling.md) |
 | *(HTTP clients)* | [curl and wget (delegation, fetch stack, policy)](http-curl-and-wget.md) |